Many animals have clitorises, a female sex organ, but experts say they're understudied.
She said she's seen more interest in this field in recent years, mostly from young female researchers.
They found that all female snakes studied have a pair of clitorises — or hemiclitores, a two-part clitoris.
Brennan said the fact that snake species have intersex individuals has heightened confusion about the creature's genital organs over the years.
Their findings suggest that, like those in human females, the dolphin's clitoris provides pleasure during sex.